
Chapter 15 399
W-CDMA Uplink Digital Modulation for Receiver Test
Overload Testing with Multiple PRACHs—Multiple ESGs
Table 15-2 Multiple ESG I/O Signals and Connections
Signal Signal Type Rear Panel
Connector
Input 10 MHz Reference
This ensures that both ESG’s timebase are
phase aligned with the BTS reference.
10 MHz IN
Frame Sync Trigger
This aligns the ESG’s frame timing with the
BTS. This ensures that the BTS can detect the
beginning of a PRACH signal radio frame.
PATT TRIG IN
PRACH Start Trigger
This is the trigger signal for ESG 1 to begin its
PRACH transmission.
BURST GATE IN
ESG Sync Pulse (only for ESG 2)
This signal lets ESG 2 synchronize with the
BTS through ESG 1. This is used if the Frame
Sync Trigger cannot be split between the two
ESGs. This may cause an additional one half
chip delay in ESG 2.
PATT TRIG IN
PRACH Start Trigger Echo Back (only for
ESG 2)
This signal triggers ESG 2 to start its PRACH
transmission. The PRACH Start Trigger signal
can be used in place of this signal, if it has the
power available to split between the two ESGs.
If the PRACH Start Trigger signal is used,
ESG 2’s synchronization source must be set to
the same source as ESG 1.
BURST GATE IN
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